Extension for marking and detecting an underground utility



FIG. 1 is a top, side, and front perspective view of the extension for marking and detecting an underground utility, the view being broken away to show that the extension may be of any length.

FIG. 2 is a top view thereof.

FIG. 3 is a bottom view thereof.

FIG. 4 is a front view thereof.

FIG. 5 is a left side view thereof, the right side view being a mirror image thereof.

FIG. 6 is a rear view thereof; and,

FIG. 7 is an alternate top, side, and front perspective view thereof.

In the drawings, the broken line showing of a riser depicts environmental subject matter and forms no part of the claim. 

The ornamental design for an extension for marking and detecting an underground utility, as shown and described. 